6 イネの内生ブラシノステロイド含有量に対する光の影響

概要

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The levels of endogenous brassinosteroids (BRs) in rice shoots grown under white lightt were higher than those grown in the dark. Especially the levels of 6-deoxocastasterone, typhasterol and castasterone were increased markedly. The BR levels were not elevated by red light and far-red light irradiation as compared with the dark condition. However, blue light increased the BR levels as much as white light did. The contents of 6-deoxocathasterone and 6- deoxoteasterone were not altered under the light conditions used. It is concluded that blue light enhances the synthesis of BRs in the latter half of the biosynthetic pathway, thereby elevating the BR levels. In rice roots, no effect of light on the BR synthesis was observed, suggesting that roots may have no light-sensing mechanism that controls the level of BRs.
植物化学調節学会の論文
2001-10-09